The sound of treated radioactive water flowing to an underground pool could be heard as media toured Japan’s Fukushima Daiichi nuclear power plant for the first time after it began releasing the water into the Pacific Ocean last week.
The plant's operator, Tokyo Electric Power Company Holdings, started releasing the first batch of 7,800 tons from 10 of the group B tanks, among the least radioactive water at the plant.
Since the earthquake and tsunami destroyed the plant’s cooling systems and caused three reactors to melt, highly contaminated cooling water applied to the damaged reactors has leaked continuously to the buildings' basements and mixed with groundwater. Some water is recycled to cool the nuclear fuel, while the rest is stored in the tanks.
About 880 tons of radioactive melted nuclear fuel remain inside the reactors. Robotic probes have provided some information but the status of the melted debris remains largely unknown, and the amount could be even larger, says Takahara, the TEPCO spokesman.
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At Fukushima Daiichi, decommissioning the nuclear plant is far more challenging than water releaseFor the wrecked Fukushima Daiichi nuclear plant, managing the ever-growing volume of radioactive wastewater held in more than 1,000 tanks has been a safety risk and a burden since the meltdown in March 2011.
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